I don't know how much I'll use it
I can access free WiFi at work... but I also have a big-screen computer on my desk so why would I squint into my phone to post on MTF?
I don't have a data plan at the moment, so I can only use the internet on my phone when I can latch on to some WiFi. Maybe I'll have the uncontrollable urge to post on MTF while I'm in a coffee shop or a McDonald's.